<div class="categories">
    <ul>
        <h3>Khoảng giá</h3>
        <?php foreach ($aryPriceStep as $key => $price) { ?>
            <li>
                <a style="cursor: pointer;" class="<?php if (isset($price_step)) echo ($price['step'] == $price_step) ? 'active' : ''; ?>" onclick="productController.getListProduct('<?php
                   echo $this->url('product-ajax/product-by-category', array(
                       'cat_id' => $category_id,
                       'cat_name' => $category_filter,
                       'order' => $order_by,
                       'maker_name' => $maker_name,
                       'price_step' => $price['step']
                   ));
                   ?>')">
                       <?php echo $price['string']; ?>
                </a>
            </li>
        <?php } ?>
    </ul>
</div>